/**
 * Copyright 2006 gworks.com.au
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. (http://www.apache.org/licenses/LICENSE-2.0)
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed 
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for 
 * the specific language governing permissions and limitations under the License.
 *
 * <dhamma-message src="Atisha (11th century Tibetan Buddhist master)">
 * 	The greatest achievement is selflessness. The greatest worth is self-mastery.
 * 	The greatest quality is seeking to serve others. The greatest precept is continual awareness.
 * 	The greatest medicine is the emptiness of everything. The greatest action is not conforming with the worlds ways.
 * 	The greatest magic is transmuting the passions. The greatest generosity is non-attachment.
 * 	The greatest goodness is a peaceful mind. The greatest patience is humility.
 * 	The greatest effort is not concerned with results. The greatest meditation is a mind that lets go.
 * 	The greatest wisdom is seeing through appearances. 
 * </dhamma-message>
 */
package org.javaongems.client.stdctrls;

import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.ui.Widget;

/**
 * <p>Provides a specification for drag'n drop handlers to respond to drag events</p>
 * <p>Responsibilities:
 * <ul>
 * 	<li> enable handlers to veto a drop from proceeding
 * 	</li> enable handlers to perform a non veto'd drop
 * </ul>
 * </p>
 * @author Ashin Wimalajeea (ash)
 */
public interface DragAndDropListener {
	public boolean onDragOver(Widget target, Widget source, int x, int y, Event evt);
	public void onDragDrop(Widget target, Widget source, int x, int y, Event evt);
}
